It seems whenever I take advantage of my tires' warranty and go in to rotate and balance my tires, the wheel always comes out slightly misaligned. A friend tells me that the steering wheel not being straight and my checking the alignent, getting that fixed and noticing it coming back straight is a total coincidence! Apparently he used to work at Sears doing just that (rotate & balancing, etc). Is it just my car that does this? I did once again purchase a car that was salvage / rebuilt, so maybe this is why it keeps showing evidence of structural damage (02 Mazda 626)

The car could have a bent unibody sub-frame or one which the body shop was not precise when straightening the car on the frame alignment machine or was bent badly enough it could never be straightened out

There could be damaged front end components which were not fixed

Some times, there is a minor issue when the car comes down from the rack but it should settle out within a few miles and straighten up